[bug#65155] [PATCH] gnu: mesa: Add native-search-paths.

[John Kehayias]

Hi David and dan,

On Sun, Feb 11, 2024 at 05:36 PM, David Elsing wrote:

> Hello,
>
> John Kehayias <john.kehayias@protonmail.com> writes:
>
>> So perhaps this belongs in vulkan-loader? Although I admit I'm less sure
>> for XDG_* related paths. Is there a test case or something we can see if
>> this does what is intended for vulkan?
>
> I also noticed the same problem and agree that the search path belongs
> in the vulkan-loader package:
>
> diff --git a/gnu/packages/vulkan.scm b/gnu/packages/vulkan.scm
> index 285d6be7f5..98ce979652 100644
> --- a/gnu/packages/vulkan.scm
> +++ b/gnu/packages/vulkan.scm
> @@ -303,6 +303,11 @@ (define-public vulkan-loader
>             wayland))
>      (inputs
>       (list vulkan-headers libxrandr))
> +    (native-search-paths
> +     (list
> +      (search-path-specification
> +       (variable "XDG_DATA_DIRS")
> +       (files '("share")))))
>      (home-page
>       "https://github.com/KhronosGroup/Vulkan-Loader";)
>      (synopsis "Khronos official ICD loader and validation layers for Vulkan")
>

Thanks for the diff, which I also tried.

>
> I tested it with
>
> guix shell -C vulkan-tools vulkan-loader mesa --no-grafts -- vulkaninfo
>
> which works with the patch applied. As documented in [1], vulkan-loader
> still needs to be part of the profile for the search path to take effect.
>
> Cheers,
> David
>
> [1] https://guix.gnu.org/manual/en/html_node/Search-Paths.html

Yes, this also works for me. It is also works on my machine when
dropping "mesa" and the "-C" without this diff; presumably because of
how my environment exists and XDG_DATA_DIRS. Probably in most desktop
setups things already work for Vulkan (or we'd have more bug reports?)
with any typical desktop/graphical packages. Still, this seems like this
should be more explicit like in the above diff for exactly the case of
things like containers or minimal testing environments.

I can apply such a change on mesa-updates soon when I make the other
mesa/vulkan/etc. updates we have pending. Feel free to submit a more
formal patch here so I can credit you as the author, though I should be
able to do the same on my own anyway.

Thanks for the diff and testing!

John